Replaceable barrel block for manual and semi-automatic air rifle and air pistols driven by pneumatic system (pcp)

ABSTRACT

Invention relates to a replaceable barrel block allowing use of barrels of different calibres on a rifle or pistol by means of providing two blocks consisting of barrel and other equipment on the barrel and mountable by the user manually without need for any additional mounting kits for manual and semi-automatic air rifles and air pistols operated pneumatically.

THE RELATED ART

Invention relates to use of more than one barrel with different calibresat same weapon by means of providing a replaceable barrel block formanual loading and semi-automatic air rifles and air pistols driven bypneumatic system. Rifle or pistol body consists of two parts, namely,fixed lower block and replaceable upper block to achieve this purpose.Barrels of different calibres are located in the upper blocks providedin advance and having same characteristic features.

The barrel blocks are replaceable on a single weapon quickly, easily andwithout need for any extra mounting kits or equipment whenever requestedby the user. Thus ammunition of different calibres can be used with thesame gun.

BACKGROUND OF THE RELATED ART

In the related art there is only one single barrel block for air riflesand air pistols with pneumatic system. Therefore, the calibre of thebarrel on the gun determines the ammunition to be used.

Some studies were conducted to eliminate this problem and offer the userthe alternative to use ammunition of different calibre with the same gunby means of replacing the barrel. In the embodiments known in relatedart it is considerably difficult to mount barrels of different calibresonto the gun and such actions are of nature that can not be made by theusers.

When it is desired to replace barrel, firstly barrel block isdismantled, then parts varying subject to ammunition calibres such asammunition needle, spring, loading lever etc. therein are removed frombarrel block.

The parts such as new ammunition needle, spring, loading lever etc. areplaced en the barrel bock again in a manner matching each other.

Probable non-matching parts or any mistakes to be made during mountingwill not only prevent functioning of the rifle or pistol but alsoinclude serious accident risks.

Properly appropriate equipment must be kept available to conduct all ofthose changes.

Use of required equipment and dismantling and re-mounting barrel allrequire expertise and professionalism.

This makes barrel replacement operation impossible for user.

On the other hand, dismantling and mounting operations take long time.

In the system disclosed under this invention rifle and pistol consist oftwo parts, namely lower block and upper block. Barrel of desired calibreand other components are placed on the upper block to providecompleteness and thus a simple embodiment has been obtained.

It is considerably easy to mount the upper block on the lower block ofthe rifle. The users are enabled to use ammunition of different calibreswith the same rifle or pistol by means of replacing the previouslyprepared upper block.

The embodiments in related art do not contain placement of barrel andother auxiliary components in one block and thus do not disclose anyreplacement of barrel in a quick way.

PURPOSE OF THE INVENTION

The purpose of this invention is to provide barrel blocks of the samecharacteristic features and place barrels and auxiliary components ofdifferent calibres onto such blocks and thus to achieve a gun embodimentallowing use of different calibres with same rifle or pistol.

In order to achieve this purpose, rifle and pistol is comprised of twoparts, namely, lower block and upper block. When it is desired to changethe barrel of rifle or pistol, both barrel and other componentscompleting functioning of the weapon are practically changed by help ofupper block at one time and thus rifle/pistol is provided with differentcalibres and different calibre ammunition can be used with the sameweapon.

Another purpose of the invention is to provide applicability in bothmanual and semi-automatic rifles and pistols driven by pneumatic system.

A further purpose of the invention is to allow replacement of the barrelby user.

Another purpose of the invention is to reduce the time needed for barrelreplacement.

A further purpose of the invention is to prevent the risks of havingaccidents that might arise from mistakes likely to be made during barrelreplacement.

Another purpose of the invention is to enable replacement of barrelwithout need for any additional equipment.

The structural and characteristic features and all advantages of theinvention will be understood better with the figures given below and thedetailed description by reference to the figures. Therefore, theassessment should be made based on the figures and the detaileddescriptions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1—is general view of air rifle with pneumatic system containing areplaceable barrel block.

FIG. 2 is a view of air rifle containing replaceable barrel block withstock removed status.

FIG. 3—illustrates status when upper block is separated from lowerblock.

FIG. 4—is exploded view of upper block and all components on the upperblock.

FIG. 5—is general view of lower block when replaceable upper block isremoved.

FIG. 6—is general view of manual and semi-automatic air pistol withreplaceable barrel block.

Part numbers are provided on the figures in order to ensure betterunderstanding of the system.

REFERENCE PART NUMBERS

-   -   1—Upper block    -   2—Lower block    -   3—Fixing screw    -   4—Speed adjustment button    -   5—Air tube    -   6—Set lever    -   7—Trigger group    -   8—Upper block dovetail grooves    -   9—Lower block dovetail grooves    -   10—Motion pin    -   11—Fixing screw housing    -   12—Ammunition Sliding Pin Housing    -   13—Ammunition Sliding Pin    -   14—Motion pin housing    -   15—Barrel housing    -   16—Barrel jacket connection extension    -   17—Barrel    -   18—Barrel connection place    -   19—Sliding pin spring    -   20—Barrel jacket    -   21—Motion wedge    -   22—Motion rod    -   23—Barrel centring bushing 1    -   24—Barrel centring bushing 2    -   25—Motion piston    -   26—Piston guide    -   27—Piston spring    -   28—Barrel jacket cap    -   29—Fixing housing    -   30—Upper Block air passage hole    -   31—Lower block air passage hole    -   32—Sealing gasket    -   33—Magazine housing

DETAILED DESCRIPTION OF THE INVENTION

This invention relates to a replaceable barrel block allowing use ofdifferent calibre ammunition with same gun by means of simply changingbarrel of manual or semi-automatic air rifles and pistols driven bypneumatic system.

In order to achieve above mentioned purpose, air rifle and pistol iscomprised of two parts, namely, lower block (2) and upper block (1).When it is desired to change barrel of the rifle, upper block easilydismantled manually by means of a screw without need for any wrench andthus the barrel located on it and other completing components can beseparated from lower block and body.

The first of said two blocks is lower block (2). The lower blockcontains trigger group (7), air tube (5) and other components requiredfor performance of rifle functions just as it is in guns conventionallyoperated pneumatically. Another component thereon is the speedadjustment button (4). The speed adjustment button (4) is placed in suchmanner that it can open and close the air passage hole (31) on the lowerblock (2). The quantity of air coming through the air tube (5) isadjusted by means of air passage hole (31) which can be narrowed down bythe speed adjustment button (4), and thus ammunition exit speed can beadjusted.

Also an air motion pin (10), an air passage hole (31) and a sealinggasket (32) are located on the same lower block (2). Fixing housing (29)is provided on rear section while two dovetail grooves (9) are providedon lower section. The lower block (2) is connected to the rifle orpistol stock by means of other components located thereon. This blockremains fixed on the stock during replacement of the barrel.

Other part is the upper block (1) consisting of replaceable barrel whichconstitutes essence of the invention. One end has a housing (15) whereplacement surface (18) of the barrel (17) sits and a jacket connectionextension (16) where barrel jacket (20) is placed. The middle part isdrilled and a housing (19) through which ammunition sliding pin (13)passes is provided.

Also the middle part has a magazine housing (33). Other end has housing(11) where fixing screw (3) is located. Lower section contains twodovetails grooves (8) and air passage hole (30) just as lower block (2).

Barrels and ammunition sliding pins (13) of different calibres areinstalled onto replaceable upper blocks (1) of same characteristicfeatures. For instance, barrel of 4.5 calibre and sliding pins matchingit or barrel of 5.5 calibre and sliding pin matching it are installedonto upper blocks (1) of same characteristic features. Thus more thanone upper block (1) of different calibres are prepared. When the userprefers to use barrel of different calibre on his/her rifle or pistol,s/he dismantles the current upper block (1) and replaces it with otherupper block (1) to achieve it. This is an incident which is much simplerand easier than the one known in the related art.

Fixing screw (3) is slightly loosened and upper block (1) is pushedforward to mount the upper block (1) onto the lower block (2). Thus thedovetail grooves (8) on the barrel block (1) are separated from thedovetail grooves (9) on the lower block (2) and so the upper block (1)is separated from the lower block (2) (see FIG. 3).

When it is desired to install the upper block (1) having barrel ofdifferent calibre, motion pin (10) located on the lower block (2) isaligned to insert into the motion pin (12) located on the ammunitionsliding pin (13) located on the upper block, and seated onto the lowerblock (2) in a manner to insert into this housing. Thus componentslocated on the replaceable upper block (1) are associated with thecomponents located on the lower block (2). Meanwhile, the fixing screw(3) is deployed into the housing (29) on the lower block (2). When it isstarted to tighten the fixing screw (3), the upper block (1) movesbackward. This motion provides insertion of dovetail grooves (8) locatedon the upper block (1) into the dovetail grooves (9) located on thelower block (2) and fixation of two blocks. Meanwhile, the sealinggasket (32) is pressed between the lower block (2) and the upper block(1). Thus the sealing of the air flowing from air tube (5) duringshooting and passing through air passage hole (31) on the lower block(2) and transferred to the upper block (1) is provided. In this way thebarrel of the rifle or pistol is replaced by use of the upper block (1)and different calibre is provided. The dovetail grooves (8/9) used hereprovide solid and rigid placement of the upper block (1) on the lowerblock (2) and integrity with the lower block (2) is provided.

As described above, barrel and its components are combined in the systemdisclosed under this invention. Thus a simple and uncomplicatedembodiment is achieved.

When it is desired to replace the barrel of the rifle or the pistol, thereplacement can be achieved by use of a screw, which can be removedmanually without need for any support apparatus (wrench etc.).

Another characteristic of the replaceable barrel block disclosed underthe invention is that it is also applicable to both manual andsemi-automatic air rifles and pistols driven by pneumatic system whichis not known in the related art embodiments.

The system developed under the invention provides the users with theadvantage to use ammunition of different calibres with the same rifle.

1. The invention is a replaceable barrel mechanism and it ischaracterized in that it consists of dismountable and mountable at least1 upper block (1) and at least 1 lower block (2) where the upper block(1) is located at least one groove (8) positioned under the upper block(1) in a manner located against each other to provide mounting andremoval of the upper block (1) to the lower block (2), at least onegroove (9) on the lower block (2), at least one fixing screw (3)providing back and forth motion of upper block (1) for loosening andtightening the grooves with each other; fixing screw housing (11)located on one end of the upper block (1) where fixing screw (3) can bemounted to the upper block (1), fixing housing (29) into which thefixing screw (3) inserts when the upper block (1) having mounted fixingscrew (3) seats onto the lower block (2) on the end of the lower block(1) at least a motion pin (10) located on the lower block (2) ammunitionsliding pin (13) consisting of motion pin housing (14) wherein themotion pin (10) inserts independent of the calibre of the ammunition tobe used ammunition sliding pin housing (12) where ammunition sliding pin(13) moves back and forth in the upper block (1) at least a lower blockair passage hole (31) on the lower block (2) where the air can move uponjoining the upper block (1) and the lower block (2) at least an upperblock air passage hole (30) under the upper block (1) at least a sealinggasket (32) located between two blocks for moving air sealing.
 2. Anupper block (1) according to claim 1 and it is characterized in that itconsists of at least one housing (12) in cylindrical form providedalongside wherein ammunition sliding pin (13) can function.
 3. An upperblock (1) according to claim 1 and it is characterized in that itconsists of at least a magazine housing (33)
 4. An upper block (1)according to claim 1 and it is characterized in that it consists ofhousing (11) in groove form matching fixing screw (3) on one end.
 5. Anupper block (1) according to claim 1 and it is characterized in that itconsists of at least a dovetail type groove (8) convenient for fixing onlower part.
 6. A fixing screw (3) according to claim 1 and it ischaracterized in that it is tightened onto replaceable barrel block (1)by means of rotating.
 7. A fixing screw (3) according to claim 1 and itis characterized in that it is of grooved structure.
 8. An ammunitionsliding pin (13) according to claim 1 and it is characterized in that ithas cylindrical form of diameter convenient for calibre of ammunition tobe used.
 9. An ammunition sliding pin (13) according to claim 1 and itis characterized in that it contains a housing (14) of a size whereinthe motion pin (10) located on the lower block (2) can insert theammunition sliding pin (13) independent of ammunition diameter.
 10. Alower block (2) according to claim 1 and it is characterized in that itconsists of at least a dovetail type groove (8) on upper part.
 11. Alower block (2) according to claim 1 and it is characterized in that itconsists of motion pin (10) to transmit the motion of trigger mechanismand insert into the ammunition sliding pin (13) when it is seated ontothe ammunition sliding pin (13).
 12. Sealing gasket (2) according toclaim 1 and it is characterized in that it is located between the upperblock (1) and the lower block (2) fixed to each other in order toprevent leakage of air coming from air tube (5).
 13. An upper block airpassage hole (30) according to claim 1 and it is characterized in thatit is of the same diameter as the lower block air passage hole (31)located on the lower block (2) where the upper block (1) and the lowerblock (2) are fixed, and is located opposite each.
 14. A lower block airpassage hole (31) according to claim 1 and it is characterized in thatit is of the same diameter as the upper block air passage hole (30)located on the upper block (2) where the upper block (1) and the lowerblock (2) are fixed, and is located opposite each.
 15. A fixing housing(29) according to claim 1 and it is characterized in that it has “U”form whereon the fixing screw (3) can seat at the end of the lower block(2).